Motor grinding-machine.



F. H. REAGAN & A. G. PHILLIPS.

MOTOR GRINDING MACHINE. Arrmouron FILED AUG. 21, 1913.

Patented Apr. 28, 71914-u 2 SHEETS-SHEET 1.

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UNrrEn sirens PATE FFCE.

FRANK H. REAGAN AND ARTHUR G. PHILLIPS, 0F SCRANTON, PENNSYLVANIA.

Specification of Letters Patent.

Application led August 21, 1913. Serial No. 785,886.

To all whom if; may concern 4 Be it known that we, F RANK H. REAGAN andARTHUR Gr. PHILLIPS, both citizens of the United States, and residentsof Scranton, in the county of Lackawanna and State of Pennsylvania, havejointly invented a certain new and useful Improvement in MotorGrinding-lllachines, of which improvement the following is aspecification.

This invention relates to machines for oscillating or rotatingjointfanges, cylinder heads, and the like, where it is desired to make aground joint between the contactingA metal surfaces, and it has for oneof its objects to provide an improved reciprocating motor for thispurpose, which shall be of simple, compact and durable construction, andadapted to be operated by fluid pressure to produce the desiredoscillating movement.

Another object is to provide improved means for 'pivotally supportingthe motor and for coupling the same to the parts to be ground.

The improvement claimed is hereinafter fully set forth.

ln the accompanying drawings: Figure 1 is a central longitudinal sectionof a reciprocating motor ,embodying our improvement; Fig. 2, a similarfragmentary section of the cylinder head', valve chamber and valve, butshowing the valve in a dierent position; Fig. 3, a sectional viewtakenon the line 3-3 of Fig. 2; Fig. 4, a transverse section taken onthe line 4 4 of Fig. 1; Fig. 5, a perspective view of the valve bushing;Fig. 6, a perspective view of the valve; Fig. 7, a view in elevation,illustrating an application of our improvement for grinding the flangejoints of a locomotive dry pipe; and Fig. 8, va similar view,illustrating an application of our improvement for grinding cylder headjoints of locomotives.

As shown on Sheet 1 of the drawings, our improved reciprocating motorcomprises a cylinder, 10, containing a piston, 11, having a hollowpiston rod, 12, extending out through a stuiling box in the cylinderhead, 13, while the other cylinder head, 14, contains the valve chamber,15, having a cylindrical bushing, 16, in which the hollow cylindricalvalve, 17, is mounted to slide. rThe valve is preferably open at one endand provided at the other end, with a project-ion, having a pin, 18, towhich the valve rod or stem, 19, is pivotally connected, the valve rodextending through a stuffing box into the cylinder and into the hollowpiston rod, and provided with a shoulder, 20, and a head, 21, adapted tobe actuated by the striking plate, 22, of the piston to shift the valveat each end of the stroke of the piston. If desired, springs, 20, and21, may

`be mounted on the valve rod in order to cushion the blows of t-hestriking plate.

The valve bushing is providedwith an inlet port, 23, communicating withsupply pipe, 24, and cylinder ports, 25 and 26, communicating `with theopposite ends of the cylinder through passage, 27, and the passage orpipe, 28, respectively. rlhe intermediate porti-on ot' the valve isprovided with an annular groove or cavity, 29, for controlling theadmission of Huid to the cylinder ports, while the exhaust ports, 30 and31, near opposite ends of the valve, communicate with the space withinthe valve which is exposed to the atmosphere through gn opening, 32, atthe end of the valve chamer. l For the purpose of maintaining the properrelation of ports in the valve and bushing, and preventing the valvefrom rotating, the valve rod may be slightly eccentric to the valve, theaxis of the valve chamber being out of line with the axis ot thecylinder and the valverod, as shown more clearly in Fig. 3 of thedrawing. 1n order to retard the movement of the valve, a frictiondevice, such as the bent spring, 33, may be employed, extending withinthe hollow valve and engaging lthe interior surface Patented A111228,1914.

thereof. This serves to hold the valve in the positions to which it ismoved by the piston, and prevents it from being displaced by thevibrations of the machine.

When the fluid, such as steam or compressed air, is turned on, it passesthrough supply pipe, 24, and with the valve in the position indicated inFig. 1, through ports, 23, 29, 26, and pipe, 28, to the left end of thecylinder, thusv moving the piston toward the right, the exhaust fromthat end of the cylinder passing out through passage, 27, and ports, 25,30, and 32, to the atmosphere. When the piston approaches the end of itsstroke, the plate, 22, engages the spring, 20a, of the shoulder, 20, ofthe valve rod, and shifts the valve to its opposite position,indicated-in Fig. 2.- Fluid then flows from the supply port, 23, throughAthe cavity, 429, of the valve port, 25, and passage, 27, to

the lett end of the cylinder, the exhaust from the opposite end passingout through pipe, 28 ports, 26, 31 'and 32. As the piston reaches theVleitend oit its traverse, the plate, 22, strikes the spring, 2l, of thehead, 21, of the valve rod, and shifts the valve to its other position.The piston continues to reciprocate in this manner as long as the fluidunder pressure is supplied to the pipe, 24. The outer end ot the valvechamber is provided with a cap, 35, having a pair of perforated lugs,34, :torming a trunnion for supporting the motor, and on which it mayosciilate when in use.

As shown in Fig. 7, the device is applied for grinding in the flangejoint of a locoinotive dry pipe, and for supporting the motor in thesmoke box ot the locomotive, the trunnion is mounted on a brace formedof two telescoping rod sections, 36 and 37, one of which has anadjustable end piece, 38, and adapted to be extended between theopposite sides of the boiler shell. rlhe piston rod, l2, is coupled by asuitable connecting bar, 39, with the flange of the dry-pipe tee,whereby the reciprocating movement of the piston serves to oscillate theHarige upon the joint ring and grind the same to a perfeet ht.

ln Fig. 8, the device is shown as applied for grinding the joint of alocomotive cylinder head, the trunnion, 35, being mounted on a base, 40,and the piston rod being coupled to the cylinder head by means of a jig,4l. The device requires very little attention, it being merely necessaryto turn on the fluid supply to start the operation, which then goes onautomatically until the duid is shut oli when the operation iscompleted. ln this manner the cylinder head, Harige, or other part to beground, may be rapidly rotated or oscillated, and a true joint sur- Jaceproduced in the least possible time, thus greatly reducing the cost ofthe process.

Having now described our invention, what we claim as nevv and desire tosecure by Letters Patent is:

1. ln a reciprocating motor, the combination ot a ncylinder, a pistontherein having a hollow piston rod, a cylinder head containing, acylindrical valve chamber, a hollow cylindrical valve in said chamberfor controlling the supply of fluid to the opposite ends 4of thecylinder, and a valve rod extending 'within Vthe ,hollow piston rod andhaving projections adapted to be engaged by the piston at the ends o itsstroke or operating said valve.

2. Vin a reciprocating motor, the combination `of fa cylinder, a pistontherein having a hollow piston rod, la cylinder Vhead. containing -acylindrical valve chamber having inet-,eri

an exhaust opening at one end, a hollow cylindrical valve closed at oneend and open at the other and having exhaust ports communicating withsaid interior space, and a valve rod extending within the hollow pistonrod and having projections for engaging said piston.

3. ln a reciprocating motor, the combination of a cylinder, a pistontherein having a piston rod, a cylinder head containing a cylindricalvalve chamber having ports leading to opposite ends of the cylinder, asupply port, and an exhaust opening at one end, a hollow cylindricalvalve having a groove for connecting the supply with the cylinder ports,and exhaust ports communieating with the interior space of the valve,and means for actuating said valve.

l. ln a reciprocating motor, the combination of a cylinder, a pistontherein having a piston rod, a cylinder head containing a cylindricalvalve chamber, a cylindrical valve in said chamber for controlling thesupply ot' fluid to the opposite ends of the cylinder, and a valve rodconnected to said valve and extending within the piston rod foroperating said valve, said valve being disposed eccentrically to thevalve rod.

5. ln a reciprocating-motor, the combination of a cylinder, a pistontherein having a hollow piston rod, a cylinder head containing acylindrical valve chamber, a cylindrical valve in said chamber forcontrolling the supply ot fluid to the opposite ends ot' the cylinder,and a valve rod pivotally connected eccentrically to the end of thevalve and extending within the hollow piston rod.

6. In a reciprocating motor, the combination of a cylinder, a pistontherein having a hollow piston rod, a cylinder head containing acylindrical valve chamber, a hollow cylindrical valve for controllingthe supply of fluid to the opposite ends of the cylinder, a frictiondevice extending within the hollow valve, andl va valve rod extending`within the hollow piston rod and having projections for engaging saidpiston.

7. The combination of a cylinder, a piston and rod, a support, akcylinder head having a trunnion pivoted rto said support and containinga valve chamber, a valve therein controlled by the movement of thepiston, and means 'for attaching the piston rod to a part to beoscillated.

ln testimony whereof we have hereunto set our hands.

FRANK lil. REAGAN. ARTHUR G. PHllllillillPS. 'Witnessesz SAMUEL S.Reitern, `@tonnen Banania.

